fix registrant#summary when displaying only signed-up events
fix registrant#summary when displaying only signed-up events

scotthue/unicycling-registration,rdunlop/unicycling-registration,scotthue/unicycling-registration,rdunlop/unicycling-registration,rdunlop/unicycling-registration,rdunlop/unicycling-registration,scotthue/unicycling-registration